Function Management

FunctionGraph provides console-based function management.

The Node.js, Java, Python, Go, C#, PHP, and custom runtimes are supported. Table 1 provides the details.

You are advised to use the latest runtime version.

**Table 1** Runtimes
Runtime	Supported Version
Node.js	6.10, 8.10, 10.16, 12.13, 14.18, 16.17, 18.15, 20.15
Python	2.7, 3.6, 3.9, 3.10, 3.12
Java	8, 11, 17, 21
Go	1.x
C#	.NET Core 2.1, .NET Core 3.1, .NET Core 6.0
PHP	7.3, 8.3
Custom	-

Multiple code entry modes

FunctionGraph allows you to edit code inline, upload a ZIP file from Object Storage Service (OBS), or directly upload a ZIP or JAR file. Table 2 lists the code entry modes supported for each runtime.

**Table 2** Code entry modes
Runtime	Editing Code Inline	Uploading a ZIP File	Uploading a JAR File	Uploading a ZIP File from OBS
Node.js	Supported	Supported	Not supported	Supported
Python	Supported	Supported	Not supported	Supported
Java	Not supported	Supported	Supported	Supported
Go	Not supported	Supported	Not supported	Supported
C#	Not supported	Supported	Not supported	Supported
PHP	Supported	Supported	Not supported	Supported
Custom	Supported	Supported	Not supported	Supported

Function Triggers

Table 3 lists the invocation modes for different trigger types.

**Table 3** Function trigger invocation
Trigger	Invocation Mode
API Gateway (Dedicated)	Synchronous invocation is used by default. You can change it to asynchronous invocation. For details, see Asynchronous Invocation.
Timer	Synchronous (default)
Cloud Trace Service (CTS)	Asynchronous (default and cannot be changed)
Document Database Service (DDS)	Asynchronous (default and cannot be changed)
DMS (for Kafka)	Asynchronous (default and cannot be changed)
Kafka (Open-Source)	Asynchronous (default and cannot be changed)
Log Tank Service (LTS)	Asynchronous (default and cannot be changed)
Simple Message Notification (SMN)	Asynchronous (default and cannot be changed)

Logs and Metrics

FunctionGraph graphically displays function monitoring metrics and collects function running logs, enabling you to view function statuses, and locate problems by querying logs.

For details about how to query logs, see Managing Function Logs.

For details about a single monitoring metric, see section "Function Monitoring" in the FunctionGraph User Guide.

For details about tenant-level monitoring information, see Introduction to Dashboard.

Function Initialization

The initializer interface is introduced to:

Isolate function initialization and request processing to enable clearer program logic and better structured and higher-performance code.
Ensure smooth function upgrade to prevent performance loss during the application layer's cold start initialization. Enable new function instances to automatically execute initialization logic before processing requests.
Identify the overhead of application layer initialization, and accurately determine the time for resource scaling and the quantity of required resources. This feature makes request latency more stable when the application load increases and more function instances are required.

HTTP Functions

You can set Function Type to HTTP Function on the function creation page. HTTP functions are designed to optimize web services. You can send HTTP requests to URLs to trigger function execution. HTTP functions support APIG triggers only.

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